水电机组动态气隙传感器的多尺度分数阶信息融合法  

Multi-time scale fractional order information fusion method for dynamic air gap sensors of hydropower unit

作　　者：荆岫岩 孙尔军 谭志锋 郝国文 李燕 孙万泉[6] JING Xiuyan;SUN Erjun;TAN Zhifeng;HAO Guowen;LI Yan;SUN Wanquan(State Grid Corporation of China,Beijing 200240,China;State Grid Electric Power Research Institute,Nanjing 211000,China;China Electric Power Research Institute,Nanjing 210009,China;State Grid Xinyuan Group Co.,Ltd.,Beijing 100052,China;Sichuan Electric Power Research Institute,Chengdu 610095,China;School of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国家电网有限公司,北京200240 [2]国网电力科学研究院有限公司,南京211000 [3]中国电力科学研究院有限公司,南京210009 [4]国网新源集团有限公司,北京100052 [5]国网四川省电力公司电力科学研究院,成都610095 [6]华北电力大学水利与水电工程学院,北京102206

出　　处：《振动与冲击》2025年第3期202-209,共8页Journal of Vibration and Shock

基　　金：国家电网公司科学技术项目(4000-202455065A-1-1-ZN)。

摘　　要：针对水电机组动态气隙监测中产生的强噪声、尖峰特性和非高斯等复杂信号,将分数阶理论引入到机组动态信息融合处理中,通过分析定转子不同位置处传感器动态气隙的变化特性和信息相关性,提出并建立了动态气隙监测的多时间尺度分数阶信息融合法。结合机组运行和振动的数值仿真分析,针对不同噪声和故障信号的动态气隙传感器信号进行了不同时间尺度下的分数阶信息融合处理,并与传统的卡尔曼滤波结果进行了比较,充分验证了该方法的有效性和可靠性。该理论方法的研究进一步充实了水电机组状态监测和故障诊断的系统理论,也为复杂信号的处理分析提供了新的思路和方法。Here,aiming at strong noise,peak characteristics and non-Gaussian complex signals generated in dynamic air gap monitoring of hydropower unit,fractional order theory was introduced into dynamic information fusion processing of the unit.By analyzing variation characteristics and information correlation of dynamic air gap sensors at different positions of stator and rotor,a multi-time scale fractional order information fusion method for dynamic air gap monitoring was proposed and established.By combining numerical simulation analyses of unit operation and vibration,fractional order information fusion treatments under different time scales were performed for dynamic air gap sensor signals with different noise and fault signals,and the results were compared with traditional Kalman filtering results to fully verify the effectiveness and reliability of the proposed method.It was shown that this theoretical method study further enriches the system theory of status monitoring and fault diagnosis of hydropower unit,and provides new idea and method for processing and analysis of complex signals.

关 键 词：水轮发电机 气隙 分数阶 信息融合 多尺度分析 

分 类 号：TV734.2[水利工程—水利水电工程]